2018 Tesla Model 3 Brakes Problems

My hard brake lines were corroded and had to be replaced on a 7 year old model 3 with 70k miles on it. The cost was over $4000 as battery has to come out and it's very labor intensive. Tesla offered no help with paying for this. They tried to say the car probably was in a very corrosive environment before I bought the car (I purchased it about a year ago). However, I've seen little to no corrosion anywhere on the car. I've decided to report this issue after talking with several lifelong mechanics who have said they have never heard of hard brake lines failing on a car with age and mileage that mine has. Also after searching owner groups I've heard from other owners that have had this same issue and it seems like a growing number especially in early model 3 cars. I was giving a warning about low brake fluid and advised not to drive the vehicle before getting it inspected.

Vehicle is 7 years old with 107,000 miles. I received a warning regarding low brake fluid with instructions not to drive the vehicle. Dealer is advising all brake lines are rusted out and need replacement. Rusted lines are apparently causing the brake fluid to leak. I've never heard of any vehicle, let alone a 7 year old vehicle, needing all brake lines replaced. After researching online, my 2018 Tesla Model 3 is not the only Tesla Model 3 with this issue. Specifically, it appears some early 2018 Model 3s have suffered this issue. I believe this is a design defect and safety issue, and that Tesla should be voluntarily repairing affected vehicles with this known issue, since it is a design/safety issue.

The brake lines badly rusted creating safety hazard as Tesla service reported when working on other maintenance. Not a warranty issue not covered as repair is over $3800. Vehicle was not abused and was kept clean regularly - this seems to be a vehicle defect if the brake lines can get moisture trapped behind the battery pack and create excessive corrosion requiring brake line replacement.

All 4 Brake lines (tubes) from either from ABS or Brake booster pump are corroded and pierced. All brake fluid leaked front center of the vehicle and lost all brake. Brake lines or tubes are looks good from under the front and back tires. It looks like a quality of the brake lines / tubes from ABS to the bottom are not meeting the expected quality.

My Tesla got stuck in a McDonald's drive-through because the EPB (Electronic Park Break) refused to disengage. I believe it got stuck as the vehicle was pulling up to the window to pay and I had to reach out with my phone to tap their payment terminal to use Apple Pay. Then the park brake engaged I believe because I possibly lifted up from my seat, yet had my foot on the brake, but when I put it into drive, it refused to disengage. So my car got stuck for about an hour until we force skidded it out of the drive way. Now I've been stuck at this McDonald's parking lot for days, unable to drive it to get repaired or charged. Tesla Temecula refuses to schedule service and canceled the service appointment. Other further away Tesla Service Centers want to charge me hundreds of dollars for diagnosis that I don't have. This is the 2nd time the park break got stuck. The other time was in hospital ambulance ER drop-off bay. This is a major safety issue and the NHTSA should do a safety recall on this to force Tesla to fix it. It's both a software and hardware engineering issue. Yet Tesla keeps placing the blame and cost on customers to profit from their faulty engineering testing. Please help me and Tesla customer fix this!

On December 24, 2024 I was driving on Freeway 5 South and all of the sudden my vehicle came to an abrupt breaking without any reason. The traffic ahead of me was of normal traffic. This abrupt breaking happened twice within 5 minutes of time span. I have notified Tesla Service Center and the service center gave me a quote of $137.50 for diagnostic and to schedule the service. I felt that this issues should be taken care of by Tesla with no charge to me. This is a safety issue. I have experienced the abrupt breaking issues with my vehicle on many occasions since I own the vehicle in 2018. Each time I was told there's no problem with the vehicle when I notified Tesla Service Center.

Two incidents while testing the most recent version of Tesla's "Full Self-Driving": 1. While driving at less than 25mph in a residential neighborhood, using the "Full Self-Driving" mode, the car was entirely unable to detect either heavy steel plates in the road (being used to cover road work) or significant potholes in the area near the plates. 2. While driving on H1 (a federal "interstate" highway) on Oahu, at approximately 55mph, using the Tesla's "Full Self-Driving", the car inexplicably slammed on the brakes. There was absolutely nothing visibly in front of the car for at least 200 yards. The car behind me had to swerve to avoid rear-ending my vehicle.

I was driving (~42 m/h) my Model 3 Tesla on a freeway and the traffic in front of me suddenly slowed down. The driver in front of me (she was a new driver with a new car) braked hard and came to a complete stop even though the traffic in front of her was moving. I ended up colliding with her as a result. I would have expected the Tesla Forward collision system or the Automatic Emergency Braking system to have activated and prevented this crash. Further, it seems Tesla brakes behave differently when it is fully charged as the engine braking does not engage. In fact the car seems to accelerate instead. If the Tesla Forward collision system and the AEB do not work and prevent such accidents, what is the point of having these systems?

I was parked on a flat street and got in my car and began driving. I went one city block at a slow pace because cars were stopped ahead. I pressed my brake pedal and it went all the way to the floor with no tension or braking. It was “floppy”. I was able to stop in the road (in traffic) and since it was a quiet street I decided I should try to reboot the car (thinking maybe it was a software glitch). Luckily only 2 cars passed me as this was happening because even the hazard lights go off during a reboot. Once the car was started up the brakes felt tight again so I drove another block, still going under 20 MPH. At the next intersection the brakes stopped working again and were “loose”My foot would go all the way to the floor with no effect. I saw a space at the corner to pull into (not a legal parking space but my car could fit so I could pull out of traffic). The regenerative brakes worked and I rolled to a stop. I called Tesla. They agreed the car was not safe to drive and asked me to tow it to them. They worked on the car for about a week and half. They told me the Hydraulic Control Unit failed and was replaced. They said the unit is in a protected area and did not fail because of impact or because of my breaking habits. They said it is possible that it might just fail overtime. But there was no warning, light or indicator that it was failing, and the brakes just stopped working suddenly it could’ve been much worse. If I had parked on a hill that day or made my way to a freeway this would have been a very different story. I can’t believe that brakes can fail like that with no warning at all.

I was traveling about 10-15 mph and my car unexpectedly activating the automatic emergency braking system. It was very scary and dangerous

The brake lines rusted out and caused the brake to go out while my wife was driving with our newborn baby. The car is not even 5 years old. I have read of other cases of this happening.

When driving using Full Self Driving or Autopilot, the car unexpectedly and suddenly brakes as if there is something on the road which is in the way even though there is nothing there. On one trip of 260 miles, the car unnecessarily braked twice on the freeway. Had someone been following too closely to me it could have caused a collision.

Dear NHTSA, I am writing to report a safety defect with my Tesla Model 3, VIN [XXX] . On July 28th, 2023, at 3:34 PM PST, My wife [XXX] was driving into my driveway at my home at [XXX] . The weather was sunny and car was traveling at 5-10 mph. The car was not in Autopilot and the driving mode was set to Chill mode. When pressed the brake pedal to slow down, the car did not stop and went straight into my garage, causing significant damage to my home and the car. Very experienced driver and I am confident that wife was applying the brake pedal correctly. However, the car simply did not stop. I am very concerned that this is a software glitch in the Tesla car, and I am worried that it could happen to other Tesla drivers. I have tried to contact Tesla to report the issue, but I have not been able to reach anyone. I had the car towed to a body shop, but the car is now totaled and I cannot take it back to Tesla. I am requesting that NHTSA investigate this safety defect and take appropriate action to protect Tesla drivers. I am also requesting that NHTSA help me to get in touch with Tesla so that I can resolve this issue. Thank you for your time and attention to this matter. Sincerely, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

My Tesla 3 on autopilot have stopped on highways without cause this week. This happened numerous time during this year.

Brakes completely failed after the car sat idle for a week. Went to start the car and there were no breaks at all. Fortunately the car was at the garage and after close inspection of the break system it was discovered that the break lining to the break wheel assembles (both sides) had significant rust. With the left rear completely rusted out and leaked the entire fluid out. If we had driven the car it could have been a disaster. We could have been killed and or someone else killed. The car had been in a heated garaged its entire 4 year life and maintained properly. There was no damage to the vehicle prior to the break failure.

While using the traffic-aware cruise control in my Tesla model 3, going down the highway with cruise set at 75 and no cars around, the Tesla suddenly braked unexpectedly and with no visible cause. I then googled for similar tesla experiences and saw the gov was investigating this on 2021 and 2022 models, however my car is a 2017 or 18 and exhibited the same situation.

Phantom breaking. I was on cruise control only (not FSD mode) on HWY at 65 mile/hr, and my car breaking suddenly to 45 ml/hr until I took over. No one injured and no accident. There was a car behind of me when it happened, and the car changed line immediately.

My car Breaks as if i got in to an accident. This has happened more than two times. Car breaks so badly and it drops everything from seats. Very scary. Most of the time i was driving at 10-15 miles per hour in parking lots looking for parking. I always wear seatbelts. Not sure why this happens but it is very scary and had there been cars very close to me i could get rear ended. I did take the car to Tesla Dealer. They always come up with some excuses.

Multiple times when using the Auto-Pilot feature the brakes will engage and dramatically slow down the car for no reason. This has probably happened 5-10 times. At this point it is getting concerning. Luckily, no cars have been following me closely enough to cause an accident, but I'm afraid that this will occur at some point unless this is fixed. I am usually driving on the highway and there is nothing in front of me and the brakes will engage. On the screen I see arrows in the passing lane flowing in the opposite direction. I'm not sure what this means or if this is triggering the brakes.

On a recent trip from northern califorina to southern california, I experienced 5 episodes of phantom braking, that involved my brakes being applied at 75 miles per hour when no other vechiles were around me. This also happened 3 days later 4 times when traveling from southern california to my home in northern california. all incidents happened on hwy I--5 I have contacted Tesla service and they tell me nothing is wrong after checking vehicle logs. I believe this is a known issue, that is why i am reporting it. my first trip was sep 1st and second trip was sept 4th In all incidents adaptive cruise control was engaged